Method of and apparatus for transferring glass parisons



0ct.,6, 1931. K. E. PEILER 1,826,019

METHOD OF AND APPARATUS FOR TRANSFERRING GLASS PARISONS Filed Aug. 11, 1924 [72067ZCO7'2' I [I'arZ EPez'Zer by m Patented Oct. 6, 1931 UNITED s'rzvrss 'PATENT OFFICE KARL E. PEILER, OF WEST HARTFORD, CONNECTICUT, ASSIGNOR 'IO HARTFORD-EMPIRE COMPANY, OF HARTFORD, CONNECTICUT, A CORPORATION OF DELAWARE METHOD OF AND APPARATUS FOR TRANSFERRING GLASS PARISONS Application filed August 11, 1924. Serial No. 731,296.

My invention relates to the manufacture of bottles or other hollow glassware by the method in which a blank or parison is formed in a parison mold and is then transferred to a finishing mold where it is-expanded into its final shape.

The object of my invention is to provide an improved method and apparatus for transferring the blank from the parison 1o mold to the finishing mold. According to this invention, the blank or parison is formed in an inverted or neck-down position and is thereafter reverted to a neck-up position for finishing in the blow mold by means of a swinging neck ring, which supports the bare parison during the transfer, and WhlCh 1s mounted on a member that is offset from the axis of swing.

In the method of transferring a blank from a neck-down position at a blank-forming station to a neck-up position at a finishblowing station by swinging or reverting it about a horizontal axis, transverse distortion of the blank may be caused in two ways; first, by the centrifugal force throwing the blank away from the axis of reversion, and sec-ond,"by the inertia of the blank, which causes it to resist rotation about its own center of gravity. I

The first of these efiect's may be compensated by the action of gravity, in two ways.

'First, the time of reversion and the radius of reversion may be so adjusted that the total bending of the blank away from the center of reversion, caused by the centrifugal force, is just equal to the total tendency of the blank to bend toward the center of reversion due to gravity, at the time of the completion of reversion. Depending onthe type 40 of velocity curve employed 1n reversion, either of these effects may preponderate at certain points of the path, but the radius and period of reversion may be so adjusted that the resultant effect is nil at the completion of the operation. I find, for instance, that if the blank be inverted at constant angular velocity, 1"=2.O7lT for compensation, where 1' is the radius of reversion in feet, and T is the period of reversion in seconds. The con- 59 stant depends solely on the form of the ve- Where g is the acceleration of gravity and 0 the angle of reversion, the relation between 0 and if being d0 WW)- By means of this formula, the relation between the radius and the period of reversion may be computed for any velocity curve wi'jhilch permits of the integrals being evalua e The second method of compensating for this effect is necessary only in extreme cases of long heavy blanks. In this case the form of the velocity curve is so controlled that the drooping effect of gravity, and the centrifugal force, exactly compensate each other at every point of the path of reversion. To achieve this result, the angular displacement is expressed as an elliptic function of the time, and the relation between the radius and the period of reversion is 1" 1.1691 Practically this velocity curve is almost equivalent to a constant angular acceleration for 72, a constant angular velocity for 36 and a constant angular deceleration for 72.

The second type of distortion above referred to; namely, that due to the inertial resistance of the blank to being revolved about its own center of gravity, may-be compensated by oifsetting the center of reversion from the plane of the neck ring, towards the center of gravity of the blank. In this case, as shown. in Fig. 2, the impelling force exerted on the blank by means of the neck ring does not act through the center of gravity of the blank, but outside the center of gravity.

I This impelling force is thus resolvable into two components, one a through the center of gravity of the blan and tending to revolve it about the center of reversion, and the other acting at right an les to the axis of the blank, tending to revo ve it about its center of gravity. This latter component exerts a moment about the center of avity of the blank which counteracts the inertial resistance of the blank to rotation about its center of avity, which resistance would otherwise 'stort the neck of the blank. During the deceleration period a similar compensation results, both effects being reversed in direction. The analytical computation of the amount of offset is cumbersome, but the solution is readily obtained by an approximate graphical method.

y these means, namel the proper adjustment of the velocity reversion and the radius of reversion so that the centrifugal force balances the efiect of gravity, and the proper amount of ofi'set of t e axis of reversion from the plane of the neck ring, so that the force exerted by the neck ring counteracts the inertial movement of the blank about its center of gravity during acceleration and retardation, lateral distortion of the Hare blank is avoided, and the blank is brought to the finishing mold in roper shape and condition for the final b owing operation.

A development of the principle outlined above consists in introducing the air into the finishing mold throu h an opening in the neck ring while the nec ring is still supportigg the blank in the finishing mold. This meth of introducing air into the finishing mold has the advantage that a good joint can be readily made between the blowhead and the neck rin and it has the additional advantage that tfie neck of the finished bottle projects above the finishin mold in a 'tion in which it may be rea ily grasped or removing the finished article from the mold. This method of introducing air into the mold may, however, be dispensed with, as will be more fully explained below.

In the accompanying drawings:

Figure 1 illustrates in a diagrammatic manner so much of the structure of a bottle machine as is necessary to illustrate my invention, this structure being shown partly in side elevation and partly in vertical section- Fig. 2 is a composite di mmatic view illustrating the present me 0d of transferring a blank from a blank-forming station to a finish-blowing station in comparison with the most nearl similar prior method of transferring a b nk between these stations;

Fig. 3 is a diagrammatic view illustrating a parison being transferred from a neckdown position at a blank-forming station to means for inverting the neck ring and oper-.

ati the inverting rack shown in 1, by wh1c the speed 0 inverting movement may be controlled,

In the drawings, the numeral 2 indicates one-half of a blank mold which is sup rted by means of an arm 3 u n a verticai pivot 4 and which is adapted to coo rate with another similar half-mold to de e a cavity having the proper shape to contain an inverte parison 5-. In the a aratus illustrated, this parison is of suitable shape to be expanded into a bottle in a finishing mold, one half of which is indicated at 6. A temporary closure member 7 is provided to close the top ofpening in the parison mold after a charge 0 glass has been introduced into the mol cavity, and air may be admitted to the hollow stem 8 of the closure member 7 to settle the charge of glass in the cavity of the parison mol The half-sections 2 of the arison mold are provided at their lower en with complementary recesses that cooperate to surround a neck rin 10 which is su ported upon an arm 11. he arm 11 extend 12 which is mounted upon a horizontal pivot 13 and is adapted to swin between the fullline position shown in Fig. 1 of the drawings to the position shown in dotted lines. Any suitable mechanism may be employed for rocking the carrier 12 upon its ivot, such rocking means being indicate on F' 1 as a pinion 14 secured to the carrier 12 an meshin with a rack 15 which may be reciproca by any convenient power connections to swing t e carrier 12 on its pivot 13. An example of apparatus usable for reciprocatin the rack 15 at re shown in, i 4, the meth of control followin close y that shown in British Patent 257,63 Sept. 7, 1926, to Rushen (see Fig. 3 of that patent). This mechanism as shown in dpresent Fig. 4 comprises a pneumatic cylin er having reciprocably mounted therein a piston 21 secured to the lower end of a piston rod, the upper end of which com rises the rack 15. The cylinder 20 is provid with ports 22 and 23, at the opposite ends thereof respectively. To the port 22 is connected a pipe 24 having therein a check valve 25 permitting flow only toward the cylinder 20 as indicated by the arrow adjacent to the check valve. by-pass 26 serves to permit exhaust of air from above the piston around the check valve 25, this b -pass being controlled by a suitably manua ly operable valve 27. To the port 23 is similarly connected a pipe 28 having therein a check valve 29 which rmits flow only toward the cylinder 20 as indica bv the arrow adjacent thereto in the s from a carrier.

lable'speeds is *a suitable setting of the manually operable valves 27 and 31, the speed of the inverting movement may be controlled at will.

The neck ring 10, as shown, is provided with a cavity 16 of suitable shape to form the neck or finish of the glass article, and the neck ring is also preferably provided with an opening 17 in line with the center of the neck cavity 16, the opening 17 being provided for the admission of air, or a piercing plug, or

both, during the formation of the parison, and for the admission of air to the parison when the parison is reverted and enclosed in the finishing mold 6.

In carrying out my invention by the use of the apparatus above described, the halves 2 of the parison mold are closed around the neck ring 10, a charge of glass is placed in the cavity of the parison mold, and the parison 5 is completed in the parison mold in any usual or desired manner. Thus, for example, a settling puff of air may be introduced through the stem 8 of the closure member 7, a piercing pin having been previously introduced into the mold cavity through the opening 17, and then the ,air may be blown through the opening 17 to cause the glass to conform to the shape of the mold cavity, thereby producing the parison 5.

The details of the method by which the parison is formed in the parison mold are not material to my invention, and for the present purpose it may be assumed that a parison has been formed in the mold cavity, and that the temporary closure member 7 and the blank mold sections 2 have been swung aside, leaving the parison 5 supported in an lnverted position on the neck ring 10, but otherwlse bare and out of contact with the body portion of the blank mold. The carrier 12 is then given a half-rotation upon its pivot 13 in a counter-clockwise direction, as viewed in the drawings, thereby bringing the neck ring 10 and the parison 5 to the dotted-line positions shown in Fig. 1 of the drawings.

Throughout this movement the line of action of the impelling force exerted by the neck ring falls outside the center of gravity of the parison, thereby producing a moment tending to revolve the parison about its own center of gravity, and thus invert it. Furthermore the force of gravity tending to distort the blank laterally is balanced by the centrifugal force incident to the swinging of the carrier and the neck ring, and this balance between gravity and centrifugal force ma be accuratel maintained by suitably aece crating or ecelerating the speed at which the carrier is swung.

The foregoing may be more readily understood by re errmg which 1s a composite diagrammatic view 11- lustrating the method of the present invention, wherein a blank a is swung about a horizontal axis :0 from a blank-forming station BF to a finish-blowing station FB, in comparison with the prior method of transferring a blank I) between these stations. It will be observed that the impelling force F, and the inertial reaction I of the parison a through its center of gravity form a couple tending to start the parison rotating about its center of gravity m. In the case of the blank 6 in to Fig. 2 of the drawings,

WhlCh the neck ring is not ofi'set, the impelling force F and the inertial reaction I are in the same straight line, and therefore do not form such a couple. The rotation of the blank b about its center of gravity must be caused by a couple transmitted through the neck,

which tends to distort the neck in its plastic condition. It will be apparent that the blank a is in a similarly favorable condition during deceleration, the retarding force exerted by the neck ring and the inertial force acting through the center of gravity of the parison forming a couple which tends to check the revolution of the parison about its center of gravity, and then bring it to rest when the transfer is completed.

The time of transfer is so regulated that the centrifugal force just balances the gravitational force as follows: Referring to Fig. 3, let m be the mass of the parison and Z the distance of the center of, gravity from the point of support. Also 0 is the angle through which the blank has revolved, 'w is the angular velocity and r the radius to. the center of gravity. Then the centrifugal force is m/w r, and its moment about the neck ring is mw rl. Similarly, the moment of the force of gravity about the neck ring is mgl sin 6. If the effect of gravity is to balance the centrifugal eflect, these must be equal, hence m'w rl mgl sin 0.

In accordance with the usual notation i/vii ni' hence being related to the period of transfer by the equation.

When the neck ring and the parison 5 have been brought to the dotted-line position shown in Fi 1 of the drawings, the sections 6 of the finis ing-mold are closed around the arison. The article is then preferably finished bybringing a blowhead, such as the blowhead 19, into engagement with the upe'r surface of the neck ring 10, and blowmg air through the blowhead l9 and the opening 17 in the neck ring. After the blowing operation is completed, the neck ring is opened in an suitable manner, leaving the finished bott e projecting above the finishing-mold and in a position to be grasped readily and removed by means of take-out tongs or otherwise, as may be desired.

As an alternative to the preferred finishing operation described above, the neck ring may be opened and swung back to its initial position after the parison is deposited in the finishing mold, and the parison may then be blown in the usual manner, the blowhead 19 being brought into engagement with the blow mold itself instead of into engagement with the neck ring.

It will be noted particularly that the tangential movement of the parison during the reverting operation is produced by offsetting the member 11, which supports the neck ring, from the axis of the pivot 13 around which the carrier 12 is swung. That is to say, that portion of the support 11 which is perpendicular to the longitudinal axis of the parison does not pass through the pivotal axis 13. The entire carrying device. including the members 11 and 12, may, therefore, be considered as being L-shaped, with the axis of inversion at the shorter end of the L and the neck ring at the longer end.

I am aware that it is old to transfer an inverted 'parison by means of a reverting neck ring, the axis of which passes through the axis of reversion. Such an arrangement is illustrated diagrammatically in Fig. 2 in connection with the reversion of the blank 6. The objection to this latter method is that the blank is distorted laterally, as hereinbefore explained, by the stresses generated by the moment of inertia of the blank about its own center of gravit As stated above, my present method 1V01d harmful distortion by applying the transferring force so as to tend to rotate the blank about its center of gravity. Moreover, as the parison is swung in its circular path, the bending influence of gravity is neutralized by the centrifugal force set up by swinging the transfer device, so that the bending of the neck of the parison is avoided.

I have purposely omitted from the drawings, and from the foregoing description, all details of construction which are not neces' sary in carrying out my invention, for the reason that the principles may be embodied in a wide variety of mechanisms, both as to the mountin and o eration of the blank mold and the low mo (1, and as to the swinging of the transfer mechanism and the opening and closing of the neck ring. Thus, the blank molds may be mounted on a rotary table, and the blow molds may be mounted either on the same table or on another adjacent rotary table, as will be readily apparent to those versed in the bottle-making art. If the blank mold and the blow mold are carried on separate tables or frames, the neck rin' carriers 12 are mounted on the same table wit the blank molds. I consider it advantageous, however, to mount all of the apparatus, including the blank molds, the blow molds, and the transfer devices, upon a single stationary frame.

My invention is broadly applicable to any arrangement for transferring parisons, for taking out finished articles from a glassworking machine or for any similar operation wherein a mass of lastic or partially plastic glass is $11 ported by one of its ends and is inverted by a swinging movement about a horizontal axis, whether the support for the glass is a neck ring as herein specifically shown, a pair of tongs, or a swinging mold.

It will be understood that my invention includes all modifications and adaptations, such as those herein pointed out by wa of example, and that no limitations are to imposed upon my invention, except such as are indicated in the appended claims.

I claim as my invention:

1. In the manufacture of glassware, the method of transferring a glass blank from a blank-forming mold to a finishing mold, that comprises inverting the blank b force applied to the neck of the blank an varying the speed of the inverting movement to cause the centrifugal force developed by the inverting movement to balance the action of gravity to any desired extent throughout the inverting movement, thereby preventing lateral distortion of the blank through the action of gravity during the inverting movement.

2. In the manufacture of glassware, the method of transferring a glass blank from a blank-forming mold to a finishing-mold, that comprises reverting the blank from neckdown position at the blank-mold station to upright position at the finish-mold station by force applied to the neck of said blank from the neck end thereof, and varying the speed of the reverting movement to cause the centrifugal force developed by the reverting movement to balance the action of gravity to any desired extent throughout the reverting movement, thereby preventin lateral distortion of the blank throug the action of gravity during the inverting movement.

3. In the manufacture of glassware, the method of transferring a blank froma blankforming station to a finish-blowing station which comprises swinging the blank from the blank-forming station to the finish-blowing station with the longitudinal axis of the blank substantially tangent to the are described by the center of gravity of the blank.

4. In the manufacture of glassware,'the

method of transferring a blank from a blankforming station to a finish-blowing station,

, which comprises swinging the blank from the blank-forming station to the finish-blowing station with the longitudinal axis of the 5 blank substantially tangent to the are described by the center of symmetry of the blank.

5. In the manufacture of glassware, the method of transferring a blank from a blankgo forming station to a finish-blowing station, which comprises supporting the blank by its neck and swinging the blank from the blankforming station to the finish-blowing station with the longitudinal axis of the blank substantially tangent to the are described by the center of gravity of the blank.

ti. In the manufacture of glassware, the method of transferring a blank from a blank forming station to a finish-blowing station,

to which comprises swinging the blank about a horizontal axis from the blank-forming station to the finish-blowing station with the longitudinal axis of the blank substantially tangent to the are described by the center of $5 gravity of the blank.

7. In the manufacture of glassware, the method of transferring a blank from a blankforming station to a finish-blowing station, which comprises swinging the blank from a j neck-down position at the blank-forming station to a neck-up position at the finishblowing station with the longitudinal axis of the blank substantially tangent to the are i described by the center of gravity of the '&2 blank.

8. In the manufacture of glassware, the method of transferring a blank from a blankforming station to a finish-blowing station, which comprises supporting the blank by its neck and swinging the blank about a hori- Zontal axis from a neck-down position at the blank-forming station to a neck-up position at the finish-blowing station with the longitudinal axis of the blank substantially tangent to the are described by the center of gravity of the blank.

9. In the manufacture of glassware, the method of transferring a blank from a blankforming station to a finish-blowing station, which comprises swinging the blank about a fixed axis from the blank-forming station to the finish blowin station with the longitudinal axis of the hlank substantially tangent to the are described by the center of gravity of the blank.

10. In the manufacture of glassware, the

' method of transferring a blank from a blankforming station to a finish-blowing station, which comprises supporting the blank b its neckand swinging the blank about a fixed horizontal axis from a blank-forming station to a finish-blowing station located on substantially the same working level, the longi tudinal axis of the blank being substantially tangent to the arc described by the center of gravity of the blank, and the point of support of the blank being ofi'set relative to the radius of swing passing through the point of such tangency. 7

11. In the manufacture of glassware, the method of transferring a glass blank from a blank forming station to a finish blowing station which comprises inverting the blank by a force applied to the end of the blank on a line of action such that the center of gravity of the bank is between the line of action of the impelling force and the center of reversion, and causing the centrifugal force developed by the reverting movement to counteract the action of gravity which tends to distort the blank laterally during the reverting movement.

12. The combination with a glass wo king apparatus embodying means located at a blank forming station for shaping a blank, means located at a finish blowing station for blowing the blank to final form, and means mounted for swinging movement between said stations for transferring the blank from the first mentioned station to the last mentioned station in a path in which the longitudinal axis of the blank is disposed substantially tangentially to the are described by the center of gravity of the blank during the transferring operation.

13. The combination with a glass Working apparatus embodying means located at a blank forming station for shaping a blank, means located at a finish blowing station for blowing the blank to final form, and means mounted for swinging movement between said stations for transferring the blank from the first mentioned station to the last mentioned station in a path in which the longitudinal axis of the blank is disposed substantially tangentially to the are described by the center of symmetry of the blank during the transferring operation.

14. The combination with a glass working apparatus embodying means located at a 120 blank forming station for shaping a blank, means located at a finish blowing station for blowing the blank to final form, and means mounted for swinging movement between said stations for transferring the blank from the first mentioned station to the last mentioned station, said means being adapted to support the blank by its neck with the longitudinal axis of the blank disposed substantially tangentially to the are described by 1 0 the center of gravity of the blank during the transferring operatlon.

15. The combination with a glass working apparatus embodying means located at a blank forming station for shaping a blank, means located at a finish blowing station for blowing the blank to final form, and means mounted for swinging movement about a horizontal axis disposed between said stations for transferring the blank from the first mentioned station to the last mentioned station in a path in which longitudinal axis of the blank is disposed substantially tangentially to the are described by the center of gravity of the blank during the transferring operation.

16. The combination with a glass working apparatus embodying a blank mold permanently disposed in a neck-down position at a blank forming station, means for shaping a blank in said blank mold. means located at a finish blowing station for blowing the blank to final form, and means mounted for swinging movement between said stations fortransferring the blank from a neck-down position at the first mentioned station to a neckup position at the last mentioned station in a path in which the longitudinal axis of the blank is disposed substantially tangentially to the are described by the center of gravity of the blank during the transferring operation.

17. The combination with a glass working apparatus embodying a blank mold disposed in a neck-down position at a blank forming station, means for shaping a blank in said blank mold, means located at a finish blowing station for blowing the blank to final form, and means mounted for swinging movement about a horizontal axis between said stations for transferring a blank from a neck-down position at the first mentioned station to a neck-up position at the last mentioned station, said means being adapted to support the ing station for blowing the blank to final form, and means mounted for swinging movement about a horizontal axis disposed between said stations for transferring the blank from a neck-down position at the first mentioned station to a neck-up position at the last mentioned station. said means being offset relative to the radius of swing passing substantially through the pointof tangency of the longitudinal axis of the blank with pa the are described by the center of gravity of the blank during the transferring operation.

19. The combination with a glass working apparatus embodying a blank mold disposed in a neck-down position at a blank forming station, means for shapin a blank in said blank mold, means locate at a finish blowing station. for blowing the blank to final form, and means mounted for swinging movement about a horizontal axis disposed between said stations for transferring the blank from a neck-down position at the first mentioned station to a neck-up position at the last mentioned station, said means being adapted to support the blank by its neck with the radius of swing passing through the point of support of the blank angularly displaced from the radius of swing passing through the point of tangency of the longitudinal axis of the blank with the are described by the center of gravity of the blank during the transferring operation.

20. The combination with a glass working apparatus embodying a blank mold disposed in a neck-down position at a blank forming station, means for shaping a blank in said blank mold, means located at a finish blowing station for blowing the blank to final form, and means mounted for swinging movement about a fixed axis located between said stations for transferring the blank from the first mentioned station to the last mentioned station in a path in which the longitudinal axis of the blank is disposed substantially tangentially to the are described by the center of gravity of the blank during the transferring operation.

21. In the manufacture of glassware. the method of transferring a glass blank from a blank-forming mold to a finishing-mold, that comprises inverting the blank by force applied to the neck of the blank at a speed selected with respect to the physical characteristics of the blank being transferred to effect a balance between the total distortion of the blank in one direction due to the action of centrifugal force and its total distortion in the opposite direction due to the action of gravity.

22. In the manufacture of glassware, the method of transferring a glass blank from a blank-forming mold to a finishing-mold, that comprises reverting the blank about a fixed axis from neck-down position at the blankmold station to upright position at the finishmold station by force applied to the neck of said blank at a speed selected with respect to the physical characteristics of the blank being transferred to effect a balance between the total distortion of the blank in one direction due to the action of centrifugal force and its total distortion in the opposite direction due to the action of gravity.

23. The combination with a glass working apparatus embodying a blank forming station and a finish blowing station located on substantially the same working level, of means mounted for swinging movement about a fixed horizontal axis between said stations adapted to support a blank by its neck and transfer it from the first mentioned station to the last mentioned station, the blank being supported so that is longitudinal axis is tangential with the are described by the center of gravity thereof during the transferring operation and the point of support of the blank being offset relative to the radius passing substantially through such point of tangency.

24. In a glass shaping apparatus, the combination of a blank mold and a blow mold respectively disposed in permanent neck-down and neck-up positions and in spaced relation relative to each other on substantially the same working level, a neck ring adapted to be opened and closed and being mounted for swinging movement about a fixed axis located between said molds, and means for swinging said neck ring about said axis to transfer a blank from said blank mold to said blow mold.

25. In a glass shaping apparatus, the combination of a blank mold and a. blow mold respectively disposed in permanent neck-down Y and neck-up positions on sub;-;tantially the same working level and in spaced relation relative to each other, an arm mounted for swinging movement about a fixed axis located between said molds, a neck ring adapted to be opened and closed and being carried by said arm and disposed parallel to and spaced from a plane passing through said axis, and means for swinging said arm and neck ring about said axis to transfer a blank from said blank mold to said blow mold.

26. In a glass shaping apparatus, the combination of a blank mold and a blow mold respectively disposed in permanent neck-down and neck-up positions on substantially the same working level and in spaced relation with respect to each other, an arm mounted for swinging movement about a fixed horizontal axis located between said molds, a neck ring adapted to be opened and closed and being carried by said arm and oifset rel ative to the horizontal plane passing through said axis, and means for swinging said neck ring about said axis to transfer a blank from said blank mold to said blow mold.

27. In a glass shaping apparatus, the combination of a blank mold and a blow mold respectively disposed in permanent neck-down and neck-up positions on substantially the same working level and in spaced relation relative to each other, an arm mounted for swinging movement about a horizontal axis located intermediate of said molds, said arm extending at an angle to the horizontal plane of said axis, a neck ring adapted to be opened and closed and being carried by said arm and disposed parallel to said plane, and means for swinging said arm andneck ring about said axis to transfer a blank from said blank mold to said blow mold.

28. The combination with a glass working apparatus embodying a blank mold and a blow mold disposed in spaced relation with respect to each other on substantially the same working level, of a neck ring mounted for swinging movement about an axis disposed between said molds for transferring a parison from said blank mold to said blow mold, the distance from said axis to the point of application of the impelling force for swinging movement about an axis disposed between sald molds for transferring a parison from said blank mold to said blow mold, the distance from said axis to the point of support of said parison being greater than the distance from said axis to the center of gravity of said parison and the longitudinal axis of said parison disposed substantially tangentially to the are described by the center of gravity of the parison during the transferring operation.

30. In a glass shaping apparatus, the combination of a blank mold and a blow mold respectively disposed in neck-down and neckup position, and means for transferring-a blank formed in said blank mold to said blow mold, comprising an arm pivoted on a horizontal axis located between said molds, and a neck ring carried by said arm and so located with respect to said axis as, to be below the horizontal plane of said axis when in cooperative relation with said blank mold and above said horizontal plane when in cooperative relation with said blow mold, the horizontal distance between said neck ring and the vertical plane including said axis being greater than the vertical distance between said neck ring and said horizontal plane when said neck ring is in cooperation with either of said molds.

Signed at Hartford, Connecticut, thls 6th 

